Method constructor

modules/core/LocationSystem.js:38–72

* @constructor * @param context Global shared application context

(context)

   * @param  context  Global shared application context
   */
  constructor(context) {
    super(context);
    this.id = 'locations';
    this.dependencies = new Set();

    this._wp = null;                        // A which-polygon index
    this._resolved = new Map();             // Map (id -> GeoJSON feature)
    this._knownLocationSets = new Map();    // Map (locationSetID -> Number area)
    this._locationIncludedIn = new Map();   // Map (locationID -> Set(locationSetID) )
    this._locationExcludedIn = new Map();   // Map (locationID -> Set(locationSetID) )

    // BLOCKED REGIONS
    this._blocks = [{
      locationSet: { include: ['Q7835', 'ua'] },
      text: 'Editing has been blocked in this region per request of the OSM Ukrainian community.',
      url: 'https://wiki.openstreetmap.org/wiki/Russian%E2%80%93Ukrainian_war'
    }];

    const blockedFeatures = this._blocks.map(block => {
      // Pre-resolve the blocked region locationSets into GeoJSON features
      this._resolveLocationSet(block);
      // Merge the info about the block into the GeoJSON's properties
      let feature = this._resolved.get(block.locationSetID);
      Object.assign(feature.properties, block);
      return feature;
    });

    // Make a separate which-polygon just for these (static, very few features, very frequent lookups)
    this._wpblocks = whichPolygon({ type: 'FeatureCollection', features: blockedFeatures });

    // pre-resolve the worldwide locationSet
    const world = { locationSet: { include: ['Q2'] } };
    this._resolveLocationSet(world);
    this._rebuildIndex();
  }


  /**